Annotation Configuration Confusion

[jskora]

I recently attended Keith Donald's presentation on "Developing Rich Web Applications with Spring." Keith demonstrated some annotation based configuration capabilities with Spring MVC that I am having a hard time duplicating. His example was

AT-Controller
public class HotelsController {
AT-RequestMapping
public void index(...) {...}
AT-RequestMapping
public void show(...) {...}
AT-RequestMapping
public void update(...) {...}
}

where /hotels/index would automatically map to HotelsController.index(), etc.

I can make this occur using the AT-RequestMapping("/hotels/index") explicit declaration but not the implicit /controller/method form.

I am using Spring 2.5.6 and have the DefaultAnnotationHandlerMapping, AnnotationMethodHandlerAdapter, and component-scan declarations in my servlet.xml.

Am I misunderstanding something? Do I have some configuration missing? Is this possible with Spring 2.5?

Thanks for any help,

Joe Skora

(Please replace "AT-" above with "at" symbol which is producing an error when I am trying to post this.)

[jskora]

I have gotten this working as I expect but I am not sure I completely understand the solution.

1. I added an @RequestMapping to the controller so the code is now
   

   @Controller
   @RequestMapping
   public class HotelsController {
      @RequestMapping
      public void index(...) {...}
      @RequestMapping
      public void show(...) {...}
      @RequestMapping
      public void update(...) {...}
   }

2. I also added a ControllerClassNameHandlerMapping reference and removed the DefaultAnnotationHandlerMapping and AnnotationMethodHandlerAdapter references, so my servlet.xml resembles

   <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
   <context:component-scan base-package="..."/>

I am still left wondering why this works and the other mapping handlers did not. I can't find a complete resource that defines how these handlers work individually and together.

Thanks,

Joe

[mrcritical]

Actually, the @RequestMapping on the Controller is no longer being used to map the URL to the Controller. Instead it is now using the ControllerClassNameHandlerMapping to map the HotelsController to /hotels/*. See this JavaDoc for details.

Are your method signatures different for each method? If so then that is how it is finding the correct method. When using Java 5+ and DispatcherServlet the DefaultAnnotationHandlerMapping and AnnotationMethodHandlerAdapter are automatically registered. In this case the AnnotationMethodHandlerAdapter is still being used.